Power-transmitting mechanism.



J. S. HUNTER.

POWER TRANSMITTING MECHANISM.

APPUCATION FILED AR. 8, 1913- 2 SHEETS-SHEET 1.

Inventor,

Patented Apr. 20, 1915.

Witnesse;,

Attorneys.

J. S. HUNTER.

POWER TRANSMITTING MECHANISM. APPLICATION FILED MAR. 8. 1913.

1,136,137, Patented Apr. 20, 1915.

2 SHEETS-SHEET 2.

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Attorneys.

UNITED STATES PATENT oEmoE.

JOHN S. HUNTER, 0F GOALIN'GA, CALIFORNIA.

POWER-TRANSMITTING MECHANISM.

Specification of Letters Patent.

Patented Apr. 20, 1915.

Application filed March 8, 1913. Serial No. 752,989.

To all whom, it may concern:

ie it known that 1, JOHN S. Hca 'rnn, a citizen of the United States, residmg at (.oalinga, in the county of Fresno and State iies' ianendr .the by B e :..;::Thisfeonstruction i's objectionable,however, because it not only pro duces an excessive amount of friction and.

consequently, necessitates'the expenditure of an undesirable .amount of power, 7 but also producestan undesirable pounding-action l thro the block 2. A lo g t dinal slot" '12 is ormed inthe'plate 10 and extends to points above and below the teeth on WhlCh' soon wears or the parts;

One of the objects of the present invention is to provide improved means whereby the walking beamof a well pumping machine can be o eratedeaSiI-y without producing an undesirable amount of friction and without causing excessive pounding by certainof the parts of the mechanism.. v

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made withinthe scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

.portion of a guide plate 10 the groan V p0 tion of which is parallel with the bars 4 and Referring to the figures by characters of reference C designates one end portion of a walking beam, the same being engaged by a stirrup l secured to and extending upwardly from a block 2. A rack bar 4 extends from the block 2 and one end portion of the rack bar is curved so as to engage a bolt 5 which extends transversely through the lower curved end of another rack bar 6. The upper end of rack bar 6 extends to the block 2 which is thus located between thetwo rack bars 4 and 6. Back bar 6 is arranged oppositely tothe rack bar 4 but in a difierent plane so that, when theftwo bars. 5 are viewed as m Flg. 2, acontinuous 'opm' ing 8 appears between'them. The bolt'5fl which connects the lower of the rack bars 4 and 6pm throughaorwasher 9 i d ter 6. The other endof this guide plate is and also passes through one-end mounted on a bolt 11 which extends into'or spective rack bars4 and 6.

g e drive shaft used in the apparatus has been indicated at 13and is extended between the rack bars 4 and 6 and into the slot 12. That'portion of the shaft located between the rack bars is provided with gears 14 and 15 mounted to rotate I freely, the gear 14 being constantly in mesh with the teeth on rack bar 6 while thegear 15 is constantly in mesh with the teeth on rack bar 4. A spacing disk 16 is mounted on the shaft 13 between the gears and serves not only to hold the said gears out of contact with each other but also to hold them against displacement relative to the rack bars,'this being due to the fact that the disk is sufliciently large to lap both of the rack bars as shown inFig. 3. A collar 17 is, se-

cured to the shaft 13 adjacent gear 14 and.

another collar 18 is secured to the shaft adjacent gear 15. Each of the'collars 17 and 18 is provided with a peripheral notch 19 each notch being directly back ofthe other notch. Pivotally mounted on the outer side of each gear 14 and 15 is a dog 20. An ear 21 is secured to the same side of the gear and interposed between the ear 21 and the dog 20 is a spring 22 which serves to hold the head 23 of the dog normally pressed against the periphery of the adjacent collar.

The dogs on the two gears are oppositely disposed, as shown particularly in Fig. 1.

The dogs 20 extend across the sldes of the adjacent rack bars and extending from said sides are tripping pins 24 and 25, the pin 24.

being arranged on the rack bar 6 while the pin is arranged'on the rack bar 4. Furthermore these two pins are located adjacent opposite ends respectively of the rack bars and in the structure shown the vertical [distance between the two pins is substantially equal to the. semi-circumference of the gears 14 and 15. 1

With the shaft 13 rotating in the direction indicated by the arrow in Fig. 1, it will be apparent that collar 18 will, through the wall of notch 19 and the spring pressed dogs 20, pull on the gear 15 and thus cause the rack bar 4 to move downwardly. Rack bar 6 will move downwardly with rack bar 41 andgear 14.will therefore be causedt'o rotate m a direction opposite to that in which gear v 15 is rotating. 7 When .the "rack'bars 4 moye downwardly topredetermin'ed "points, -the,,p in .25 is brought against the outer yendpf theidog 20 on gear 15 and said dogisithgs lfshifted against its spring 22 so as to; w;ithdraw'the head 23 from the pe-. ripher'al notch 19 in collar 18. Thus gear 15 becomes disconnected from shaft 13.

Simultaneously with this action, the notch in collar 17 is. brought into register with a. the head on the other dog 20 and said head promptly shifts into the notch so that further rotation of the shaft 13 will cause gear 14 to rotate therewith and thus shift 85 the rack bars 4 and 6 upwardly. This upward movement will continue until the pin 24 is brought against the outer end of the dog 20 on gear 14 whereuponsaid dog willnotched collars revoluble with the shaft and adjacent the respective gears, spring pressed dogs carried by the respective gears and i normally engagmgthe collars, and tripping means "outstanding from" and movable with the rack bars for successively disengaging.

collars' idurin'gl the "rota the dogs from the tion of theshaft. i

In testimony that l claiin thefor'egoing as i inthje presence of two witnesses y I my own, I have hereto, afli xed my signature Witnesses} C J 

